Version 4 SHEET 1 1140 680 WIRE -128 -192 -128 -208 WIRE 32 -192 32 -208 WIRE 192 -192 192 -208 WIRE 560 -144 512 -144 WIRE 656 -144 624 -144 WIRE -128 -96 -128 -112 WIRE 32 -96 32 -112 WIRE 192 -96 192 -112 WIRE 304 -96 192 -96 WIRE 192 -80 192 -96 WIRE 304 -48 304 -96 WIRE 512 -32 512 -144 WIRE 560 -32 512 -32 WIRE 656 -32 656 -144 WIRE 656 -32 624 -32 WIRE 192 0 192 -16 WIRE 0 80 -128 80 WIRE 144 80 0 80 WIRE 304 80 304 32 WIRE 304 80 144 80 WIRE 512 80 512 -32 WIRE 512 80 304 80 WIRE 544 80 512 80 WIRE 656 80 656 -32 WIRE 656 80 624 80 WIRE -128 112 -128 80 WIRE 144 112 144 80 WIRE 0 128 0 80 WIRE 304 128 304 80 WIRE 576 192 576 176 WIRE 512 208 512 80 WIRE 544 208 512 208 WIRE 656 224 656 80 WIRE 656 224 608 224 WIRE 720 224 656 224 WIRE -128 240 -128 192 WIRE 0 240 0 192 WIRE 0 240 -128 240 WIRE 144 240 144 192 WIRE 144 240 0 240 WIRE 304 240 304 192 WIRE 304 240 144 240 WIRE 544 240 512 240 WIRE 304 272 304 240 WIRE 512 272 512 240 WIRE 576 272 576 256 FLAG 304 272 0 FLAG -128 -208 V+ FLAG 32 -208 V- FLAG 32 -96 0 FLAG -128 -96 0 FLAG 576 176 V+ FLAG 576 272 V- FLAG 512 272 0 FLAG 720 224 OUT_TIA IOPIN 720 224 Out FLAG 192 0 0 FLAG 192 -208 V- SYMBOL cap -16 128 R0 SYMATTR InstName CD SYMATTR Value 100p SYMBOL res 128 96 R0 SYMATTR InstName RShunt SYMATTR Value 100Meg SYMBOL diode 288 128 R0 SYMATTR InstName D SYMBOL cap 624 -160 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName CF SYMATTR Value 0.4p SYMBOL res 640 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName RF SYMATTR Value 2Meg SYMBOL cap 624 -48 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName Cpar SYMATTR Value 1pF SYMBOL voltage -128 -208 R0 WINDOW 123 24 44 Left 2 WINDOW 39 0 0 Left 0 SYMATTR InstName Vcc1 SYMATTR Value 5 SYMBOL voltage 32 -208 R0 WINDOW 123 24 44 Left 2 WINDOW 39 0 0 Left 0 SYMATTR InstName Vcc2 SYMATTR Value -5 SYMBOL current -128 192 R180 WINDOW 0 24 80 Left 2 WINDOW 3 24 0 Left 2 WINDOW 123 24 -28 Left 2 WINDOW 39 0 0 Left 0 SYMATTR InstName I_PD SYMATTR Value SINE(1.5µ 0.4µ 100) SYMATTR Value2 AC 1 SYMBOL Opamps\\LTC6242 576 224 R0 SYMATTR InstName U1 SYMBOL res 288 -64 R0 SYMATTR InstName R2 SYMATTR Value 2Meg AC{RX} SYMBOL cap 176 -80 R0 SYMATTR InstName C1 SYMATTR Value 1u SYMBOL res 176 -208 R0 SYMATTR InstName R1 SYMATTR Value 0.5Meg TEXT -160 -296 Left 2 ;.tran 60m TEXT -144 40 Left 3 ;ESB Photodiode TEXT 480 -168 Left 3 ;TIA TEXT -160 -336 Left 2 !.noise V(out_tia) I_PD dec 100 1 10k TEXT -160 -376 Left 2 !.step param RX list 2Meg 1e20 TEXT -152 -424 Left 2 !.param RX=2000000Meg TEXT 376 -424 Left 3 ;Unoise 1Hz-10KHz\nR2 2Meg: 26uV\nohne R2: 19uV